This workshop repair manual covers the KTM 125 Duke and 200 Duke models produced between 1999 and 2003. These motorcycles, powered by the LC4 single-cylinder, 4-stroke, liquid-cooled engine, are known for their sporty performance and minimalist design, reflecting KTM's heritage in building agile and capable machines. The Duke series has been instrumental in establishing KTM's presence in the naked sportbike segment, offering a distinctive aesthetic and engaging riding experience.

This comprehensive manual provides in-depth guidance for owners and technicians on all aspects of maintenance, repair, and troubleshooting. It details procedures for engine mechanicals, fuel and ignition systems, transmission, electrical systems, chassis, suspension, brakes, and bodywork. The manual also includes routine maintenance schedules, diagnostic procedures for common issues, and step-by-step instructions for component replacement and engine rebuilds, ensuring the longevity and optimal performance of your KTM Duke.